Storm jets.

[china007]

Need help on what to upgrade the jets to after exhaust upgrade. Current jets are 34 and 105. Ordered a set of keihin clones that are small and do not ETF. Any suggestions.

Thanks

[china007]

It's the pz30 carb

[Megadan]

What jets did you order and where from? Have a model number for them?

Generally, the PZ clone carbs run a 99101-393 main jet
https://www.jetsrus.com/a_jets_by_ca...und_28-xxx.htm

[Megadan]

As far as jetting suggestions, I am going to use a TT250 as an analog - similar counterbalanced engine and Keihin carb replica with the same jets.

With an exhaust a 112 main seems like a good starting point. I would recommend a 115 to start just to be on the safe side. Keep in mind that your altitude and the current air temp will change what jetting you need. If a 112 worked for somebody in the summer at a similar altitude to you, you may be looking at a 118 if the temps are on the cold side where you live. If they were at a lower altitude, this will change it as well.

The best thing to do would be to pick up a range of jets, 110, 112, 115, 118 would likely suffice.

[XDoubleXA]

Adjustable needle
https://www.ebay.com/itm/PZ30-CARBUR...item3a70543cb2

Main Jet
https://www.ebay.com/itm/10X-5mm-Mai...item3f8a1ef444

Pilot Jet
https://www.aliexpress.com/item/Moto...311.0.0.7IN4bo

[china007]

I bought these jets from amazon.

[Megadan]

Yes, you definitely ordered the wrong jets. Those are the jets often found in PWK flat slide style carburetors.

[china007]

lucky me. So can I order the ones from this posting. Would it be easier to order a different carb. I was really hoping to ride given this nice weather in Puget Sound WA. My elevation is also around sea level to 900 feet with occasional trips to the mountain/hills.

http://www.ccwthariders.com/uploads/...ing_manual.pdf Here is also a link to tuning the carb.

[Megadan]

The bottom one is two jets. That is your main jet and needle jet still screwed together.

[china007]

Thank you for the help told you I didn't know what I was doing but I'm learning thanks to this site and members.

[Megadan]

Originally Posted by china007

Thank you for the help told you I didn't know what I was doing but I'm learning thanks to this site and members.

That's why we are here. Don't feel bad about not knowing either. Not many people even know how a carb works, let alone how to identify the individual parts. Knowing is half the battle, and we all had to learn at some point. I learned about carbs on a 1976 Buick 455 with a quardrajet carb at the age of 16. My dad helped me remove it, sat me down at a table, gave me some tools, a manual, and let me get to work. Trust me, I made mistakes lol.

[china007]

I'm still having trouble finding the jets that I posted in post 15. I purchased to sets and they are not even close. I even bought an online carb rebuild kit listed for this carb and it was the wrong one. I'm about to just buy the mikuni but what are your thoughts. Any help for the right parts would be greatly appreciated.

[china007]

@Barlow where did you buy the jets for your storm. Thanks

[Ariel Red Hunter]

Originally Posted by china007

I'm still having trouble finding the jets that I posted in post 15. I purchased to sets and they are not even close. I even bought an online carb rebuild kit listed for this carb and it was the wrong one. I'm about to just buy the mikuni but what are your thoughts. Any help for the right parts would be greatly appreciated.

This is the reason I recommend just buying a Mikuni as soon as you decide jetting changes are going to be required. Do yourself another favor and only buy genuine Mikuni jets. The knock-off jets are not made accuratly enough. For non-racing bikes I set them up this way: I set the idle fuel screw at 1 1/2 turns out, and change pilot jets until I get as close to a perfect 1300-1400 rpm idle as possible. Then I put the needle D-ring in the middle slot on the needle. Now I change main jets to get good open throttle mixture. I use the roll-on roll-off methoed. Don't do the full throttle test until you've been riding it for 15-20 minutes, so that the engine is well warmed up. Then ride it hot and winding, but not all the way to the rev limiter. Roll off the throttle 1/8th of a turn with the twist grip. Immediatley roll it all the way back on. If the bike immediatly revs, the main jet is too lean. If it stumbles it is too rich. You must do this in high gear in order to really load the engine. When you get the main jet right then adjust your idle mixture screw for highest idle speed (screw should end somewhere between 1 1/4 open to 1 3/4 open) with the idle mixture screw. Reset idle speed at 1250-1400 rpm. Now ride the bike back and forth through the 1/4 throttle position to make sure you have a smooth transition. If it isn't, adjust the needle up (Richer) or down (leaner) no more than 1 notch, and you should be good to go...ARH

[BARLOW]

at around 600 feet (i think) i run 40/115 in my storm ... was a little rich before the cat was out and opened the air box, not sure yet after that. i suspect until i get a better exit hole, it will still be a tad rich.